<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>你好世界</title>
</head>
<body>
    <h1>hello world</h1>
    <form method="post" action="/a/b/c">
        用户名:<br>
        <input type="text" name="username">
        <br>
        密码:<br>
        <input type="password" name="psw">
        <br>
        <br>
        <input type="submit" value="提交">
        </form>
</body>
</html>